Mupirocin (bactroban?

Mupirocin (Bactroban®)
Topical antibiotic – imipenem–like protein synthesis inhibitor

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What is Mupirocin?

Mupirocin is a synthetic antibiotic derived from Pseudomonas fluorescens.
It binds to bacterial isoleucyl‑tRNA synthetase, blocking protein synthesis and thus killing the bacteria.

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Primary Uses

Indication	Typical Site	Typical Duration
Impetigo	Skin (face, arms, legs)	7–10 days
Staphylococcal folliculitis	Hair follicles	5–7 days
Acne vulgaris (when S. aureus is a factor)	Facial skin	10–14 days
Peri‑operative skin prep	Surgical sites	5–7 days (pre‑op only)

Key point: Mupirocin is not for systemic infections; it’s strictly topical.

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How to Use

1. Clean the affected area with soap and water.
2. Dry completely.
3. Apply a thin layer (about 0.2 g) of ointment or cream to the wound or lesion.
4. Cover with a non‑adherent dressing if needed (but avoid occlusion).
5. Re‑apply 2–3 times daily (every 8–12 hrs).
6. Wash hands after each application.

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Common Side Effects

Symptom	Frequency	What to do
Mild irritation or itching	<10 %	Discontinue if severe
Local burning	<5 %	May be transient
Skin rash (rare)	<1 %	Seek medical advice

Systemic toxicity is extremely rare because absorption is minimal.

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Precautions & Contra‑Indications

Condition	Consideration
Allergy to mupirocin	Avoid; check for cross‑reactivity
Use of topical steroids	Do not combine unless instructed by a physician
Compromised skin (e.g., eczema, burns)	Use cautiously; may need lower concentration or alternative therapy
Pregnancy/Breastfeeding	Generally considered safe; consult physician
Immunosuppressed patients	May need broader coverage; watch for secondary infections

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Drug Interactions

• None significant when used topically.
• Concurrent antibiotics: no additive or antagonistic effects known.

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Storage

• Keep below 25 °C (77 °F).
• Protect from moisture and light.
• Store out of reach of children.

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Quick FAQ

Question	Answer
Can I use it on my mouth?	No; it’s for skin only.
What if the infection doesn’t improve?	Re‑evaluate; consider culture for resistant organisms or switch to a systemic antibiotic.
Is it safe for pets?	No; veterinary formulations are different.
Can I use it on a wound with a drain?	Avoid applying directly to the drain; keep the surrounding skin treated.

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Bottom Line

Mupirocin is a reliable, safe, and effective topical antibiotic for S. aureus‑related skin infections. Stick to the recommended dosage and duration, watch for local irritation, and you’ll likely see clear improvement within a week or two. If you have any doubts or persistent symptoms, consult your healthcare provider.